java.lang.IllegalArgumentException: Invalid Region.Op - only INTERSECT and DIFFERENCE are allowed

[mewais]

Hello, I'm trying to use the library, I was just following the README. I added the compile 'com.github.alamkanak:android-week-view:1.2.6' statement to my build.gradle file. I also added the Weekview to my layout.xml but it causes this error to arise:

    java.lang.IllegalArgumentException: Invalid Region.Op - only INTERSECT and DIFFERENCE are allowed
        at android.graphics.Canvas.checkValidClipOp(Canvas.java:779)
        at android.graphics.Canvas.clipRect(Canvas.java:918)
        at com.alamkanak.weekview.WeekView.drawHeaderRowAndEvents(WeekView.java:591)
        at com.alamkanak.weekview.WeekView.onDraw(WeekView.java:488)
        at android.view.View.draw(View.java:20205)
        at android.view.View.updateDisplayListIfDirty(View.java:19080)
        at android.view.View.draw(View.java:19933)
        at android.view.ViewGroup.drawChild(ViewGroup.java:4333)
        at android.view.ViewGroup.dispatchDraw(ViewGroup.java:4112)
        at android.support.constraint.ConstraintLayout.dispatchDraw(ConstraintLayout.java:1966)
        at android.view.View.updateDisplayListIfDirty(View.java:19071)
        at android.view.View.draw(View.java:19933)
        at android.view.ViewGroup.drawChild(ViewGroup.java:4333)
        at android.view.ViewGroup.dispatchDraw(ViewGroup.java:4112)
        at android.view.View.updateDisplayListIfDirty(View.java:19071)
        at android.view.View.draw(View.java:19933)
        at android.view.ViewGroup.drawChild(ViewGroup.java:4333)
        at android.view.ViewGroup.dispatchDraw(ViewGroup.java:4112)
        at android.view.View.updateDisplayListIfDirty(View.java:19071)
        at android.view.View.draw(View.java:19933)
        at android.view.ViewGroup.drawChild(ViewGroup.java:4333)
        at android.view.ViewGroup.dispatchDraw(ViewGroup.java:4112)
        at android.view.View.updateDisplayListIfDirty(View.java:19071)
        at android.view.View.draw(View.java:19933)
        at android.view.ViewGroup.drawChild(ViewGroup.java:4333)
        at android.view.ViewGroup.dispatchDraw(ViewGroup.java:4112)
        at android.view.View.updateDisplayListIfDirty(View.java:19071)
        at android.view.View.draw(View.java:19933)
        at android.view.ViewGroup.drawChild(ViewGroup.java:4333)
        at android.view.ViewGroup.dispatchDraw(ViewGroup.java:4112)
        at android.view.View.draw(View.java:20208)
        at com.android.internal.policy.DecorView.draw(DecorView.java:780)
        at android.view.View.updateDisplayListIfDirty(View.java:19080)
        at android.view.ThreadedRenderer.updateViewTreeDisplayList(ThreadedRenderer.java:685)
        at android.view.ThreadedRenderer.updateRootDisplayList(ThreadedRenderer.java:691)
        at android.view.ThreadedRenderer.draw(ThreadedRenderer.java:799)
        at android.view.ViewRootImpl.draw(ViewRootImpl.java:3263)
        at android.view.ViewRootImpl.performDraw(ViewRootImpl.java:3079)
        at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:2459)
        at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1447)
        at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:7130)
        at android.view.Choreographer$CallbackRecord.run(Choreographer.java:935)
        at android.view.Choreographer.doCallbacks(Choreographer.java:747)
        at android.view.Choreographer.doFrame(Choreographer.java:682)
        at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:921)
        at android.os.Handler.handleCallback(Handler.java:873)
        at android.os.Handler.dispatchMessage(Handler.java:99)
        at android.os.Looper.loop(Looper.java:193)
        at android.app.ActivityThread.main(ActivityThread.java:6642)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)

Any ideas why this happens? Thanks.

[thellmund]

Hi, I’ve experienced the same issue and implemented a fix. Take a look here #521. Hope it helps!

[Nikoloutsos]

I think you will solve this issue by just setting the targetSdkVersion to 27. At least that worked for me!